ccna復(fù)習(xí)-ccna640-802題庫(kù)v104.4完美注釋版

QUESTIONQUESTIONWhenyouareloggedintoaswitch,whichpromptindicatesthatyouareinprivileged%@>$#Answer:QUESTIONWhichcommandshowssystemhardwareandsoftwareversionshowshowoshowshowaomshowAnswer:查看系統(tǒng)的硬件信息使用令是showQUESTIONCiscoCatalystswitchesCAT1andCAT2haveaconnectionbetweenthemusingportsFA0/13.An802.1QtrunkisconfiguredbetweenthetwoswitchesOnCAT1,VLAN10ischosenasnative,butonCAT2thenativeVLANisnotspecified.Whatwillhappeninthisscenario?802.1QgiantsframescouldsaturatetheVLAN10onCAT1andVLAN1onCAT2willsenduntaggedAnativeVLANmismatcherrormessagewillVLAN10onCAT1andVLAN1onCAT2willsendtaggedAnswer:QUESTION2/29subnet?A.Router(config-B.Router(config-C.Router(config-D.Router(config-E.Router(config-F.Router(config-Answer:QUESTIONThenetworkdefaultgatewayapplyingtoahostbyDHCPis3/28.WhichoptionisthevalidIPaddressofthishost?Answer:C：正確D：網(wǎng)絡(luò)號(hào)E：QUESTIONWhichtwoaddressescanbeassignedtoahostwithasubnetmaskof?(ChooseAnswer:A：網(wǎng)絡(luò)號(hào)B/D： 地址E：網(wǎng)絡(luò)號(hào)QUESTIONThenetworkadministratorhasaskedyoutocheckthestatusoftheworkstation'sIPstackbyingtheloopbackaddress.Whichaddresswouldyoutoperformthistask?Answer:QUESTIONWorkstationAhasbeenassignedanIPaddressof4/28.WorkstationBhasbeenassignedanIPaddressof00/28.Thetwoworkstationsareconnectedwithastraight-throughcable.Attemptstobetweenthehostsareunsuccessful.Whattwothingscanbedonetoallowcommunicationsbetweenthehosts?(Choosetwo.)ChangethesubnetmaskofthehoststoChangethesubnetmaskofthehoststoChangetheaddressofWorkstationAtoAnswer: QUESTIONYourISPhasgivenyoutheaddress/29toassigntoyourrouter'sinterface.Theyhavealsogivenyouthedefaultgatewayaddressof.Afteryouhaveconfiguredtheaddress,therouterisunabletoanyremotedevices.Whatispreventingtherouterfromingremotedevices?ThedefaultgatewayisnotanaddressonthisTheIPaddressisthebroadcastaddressforthisAnswer: 默認(rèn)網(wǎng)關(guān)是這個(gè)子網(wǎng)的廣播地址，正確C：這個(gè)地址是子網(wǎng)的廣播地址，錯(cuò)誤D：這QUESTIONWhichcommandisusedtocopytheconfigurationfromRAMintocopyrunning-configstartup-copystartup-config:running-copyrunningconfigstartupcopystartupconfigrunningwriteAnswer:QUESTIONWhichcommandisusedtoloadaconfigurationfromaTFTPserverandmergetheconfigurationcopyrunning-config:copyFP:running-copyFT:startup-copystartup-config:Answer:QUESTIONAsystemadministratortypesthecommandtochangethehostnameofarouter.WhereontheCiscoIFSisthatchangestored?Answer:QUESTIONWhichcommandisusedtoconfigureadefaultA.B.C.D.Answer:QUESTIONIfIProutingisenabled,whichtwocommandssetthegatewayoflastresorttothedefaultgateway?(Choosetwo.)ipdefault-gatewayiprouteipdefault-networkipdefault-routeiprouteAnswer:CEipdefault-networkipQUESTIONQUESTIONWhichcommandwouldyouconfiguregloballyonaCiscorouterthatwouldallowyoutoviewdirectlyconnectedCiscodevices?enablecdpcdprunAnswer:QUESTIONWhichcommandisusedtoseethepathtakenbypacketsacrossanIPshowipshowtraceipAnswer:A:查看路由表B：沒(méi)有這條命令C：正確D：QUESTIONWhichcommandisusedtodebugadebugdebugipdebugdebugAnswer:QUESTIONWhichcommanddisplaysCPUshowshowshowshowAnswer:BQUESTIONQUESTIONWhenconfiguringaserialinterfaceonarouter,whatisthedefaultatm-Answer:QUESTIONbestroute?Answer:QUESTIONAcompany erIPontheirEthernetLAN.Theusersnoticethatnetworkslowsdown,and eitherstuttersorfailscompley.WhatisthemostlikelyreasonforminimumcellratequalityofservicepacketswitchingexchangereliabletransportprotocolAnswer:QUESTIONWhichlayerintheOSIreferencemodelisresponsiblefordeterminingtheavailabilityofthereceivingprogramandcheckingtoseeifenoughresourcesexistforthatcommunication?Answer:QUESTIONDatatransferisslowbetweenthesourceanddestination.ThequalityofservicerequestedbythetransportlayerintheOSIreferencemodelisnotbeingmaintained.Tofixthisissue,atwhichlayershouldthetroubleshootingprocessbegin?Answer:QUESTIONWhichprotocolsarefoundinthenetworklayeroftheOSIreferencemodelandareresponsibleforpathdeterminationandtrafficswitching?Answer:QUESTIONshowshowshowAnswer:QUESTIONWhichthreeoptionsarevalidWANconnectivitymethods?(ChooseAnswer:A:點(diǎn)到點(diǎn)協(xié)議，正確 QUESTIONRefertotheexhibit.WhichWANprotocolisbeingFrameAnswer:QUESTIONACSU/DSUconvertsogsignalsfromaroutertoaleasedline;amodemconvertsogsignalsfromaroutertoaleasedline.fromaroutertoaleasedline.fromaroutertoaphoneline.ACSU/DSUconvertsdigitalsignalsfromaroutertoaleasedline;amodemconvertsdigitalsignalsfromaroutertoaphoneline.Answer:QUESTIONAnetworkadministratormustconfigure200switchportstoaccepttrafficfromonlythecurrentlyhostdevices.WhatwouldbethemostefficientwaytoconfigureMAC-levelsecurityonalltheseVisuallyverifytheMACaddressesandthennettotheswitchestoentertheswitchport-portsecuritymac-addresscommand.HaveenduserstheirMACtotheswitchtoentertheswitchport-portsecuritymac-addresscommand.Usetheswitchportport-securityMACaddressstickycommandonalltheswitchportsthathaveenddevicesconnectedtothem.Useshowmac-address-tabletodeterminetheaddressesthatareassociatedwitheachportandthenenterthecommandsoneachswitchforMACaddressport-security.Answer: QUESTIONWhentroubleshootingaFrameRelayconnection,whatisthestepwhenperformingaloopbackSettheencapsulationoftheinterfacetoPlacetheCSU/DSUinlocal-loopEnablelocal-loopmodeontheDCEFrameRelayVerifythattheencapsulationissettoFrameAnswer:QUESTIONWhatoccursonaFrameRelaynetworkwhentheCIRisAllTCPtrafficismarkeddiscardAllUDPtrafficismarkeddiscardeligibleand AllTCPtrafficismarkeddiscardeligibleand isAlltrafficexceedingtheCIRismarkeddiscardAnswer:QUESTIONWhataretwocharacteristicsofFrameRelaypoint-to-pointsubinterfaces?(ChooseTheycreatesplit-horizonTheyrequireauniquesubnetwithinaroutingTheyemulaeasedTheyareidealforfull-meshTheyrequiretheuseofNBMAoptionswhenusingAnswer: 每個(gè)子接口需要一個(gè)獨(dú)立的網(wǎng)段，正確。C：QUESTIONRefertotheexhibit.Addresseswithintherange/24arenotbeingtranslatedtothe1.128.0/16range.Whichcommandshowsif/24areallowedinsideaddresses?debugipshowaccess-showipnatshowipnatAnswer: QUESTIONaccesspointdoesnotlistanyactiveWLANclients.Whatisapossiblereasonforthis?TheincorrectchannelisconfiguredontheTheclient'sIPaddressisonthewrongTheisconfiguredincorrectlyontheAnswer:A：不正確的信道。錯(cuò)誤B：客戶端的IP地址配置錯(cuò)誤C：客戶端的共享key錯(cuò)誤。D：QUESTIONWhichtwofeaturesdidv1addtoaddresstheinherentweaknessesfoundin?(ChooseastrongerencryptionkeymixingusingtemporalsharedkeyashorterinitializationperframesequenceAnswer: QUESTIONWhichtwowirelessencryptionmethodsarebasedontheRC4encryptionalgorithm?(ChooseAnswer: QUESTIONWhataretwocharacteristicsofRIPv2?(Chooseclassfulroutingvariable-lengthsubnetbroadcastmanualrouteusesSPFalgorithmtocomputeAnswer:A：有類路由協(xié)議，錯(cuò)誤B：可變長(zhǎng)度子網(wǎng)掩碼，正確C：采用廣播地址更新，錯(cuò)誤D：QUESTIONWhichtwoEthernetfiber-opticmodessupportdistancesofgreaterthan550Answer:QUESTIONWhattwothingswillarouterdowhenrunningadistancevectorroutingprotocol?(ChooseSendentireroutingtabletoallroutersintheroutingMaintainthetopologyoftheentirenetworkinitsAnswer:A：周期性更新，正 發(fā)送整個(gè)路由表到整個(gè)路由域，錯(cuò)誤，只發(fā)送給鄰居C： QUESTIONRefertotheexhibit.Accordingtotheroutingtable,wherewilltheroutersendapacketdestinedforAnswer:QUESTIONWhichcommandshowsifanaccesslistisassignedtoanshowipinterface[interface]access-showipaccess-listsinterfaceshowipinterfaceshowipaccess-listsAnswer:QUESTIONRefertotheexhibit.WhichruledoestheDHCPserverusewhenthereisanIPaddressTheaddressisremovedfromthepooluntiltheisTheaddressremainsinthepooluntiltheisOnlytheIPdetectedbyGratuitousARPisremovedfromtheOnlytheIPdetectedbyisremovedfromtheTheIPwillbeshown,evenaftertheisAnswer:showipdhcp命令可以查看哪些ip地址在使用上有。有的地址不再分配出去。 QUESTIONRefertotheexhibit.YouareconnectedtotherouterasuserMike.WhichcommandallowsyoutoseeoutputfromtheOSPFdebugcommand?terminalshowshowshowipospfAnswer: QUESTIONRefertotheexhibit.Ifnumber2isselectedfromthesetupscript,whathappenswhentheuserrunssetupfromaprivilegedprompt?SetupisadditiveandanychangeswillbeaddedtotheconfigSetupeffectivelystartstheconfigurationoverasiftherouterwasbootedfortheSetupwillnotrunifanenablesecretpasswordexistsontheSetupwillnotrun,becauseitisonlyviablewhennoconfigurationexistsontheAnswer:C：如果配置了，設(shè)置不會(huì)運(yùn)行 QUESTIONRefertotheexhibit.Which(config-router)commandwillallowthenetworkrepresentedontheinterfacetobeadvertisedbyRIP?redistributenetworkredistributenetworkAnswer:QUESTIONRefertotheexhibit.WhatinformationcanbegatheredfromtheOnerouterisrunningRIPneighborisThenetworkcontainsaNetworkisAnswer:QUESTIONRefertotheexhibit.WhattypeofconnectionwouldbesupportedbythecablediagramPCtoPCtoservertoroutertoAnswer:QUESTIONRefertotheexhibit.WhattypeofconnectionwouldbesupportedbythecablediagramPCtoPCtoservertoswitchtoAnswer:QUESTIONWhichtwostatementsdescribetheCiscoimplementationofVLANs?(ChooseVLAN1isthedefaultEthernetCDPadvertisementsareonlysentonVLANBydefault,themanagementVLANisVLANBydefault,theswitchIPaddressisinVLANVLAN1002through1005areautomaticallycreatedandcannotbeAnswer: QUESTIONNoconfigurationfilewasfoundinNoconfigurationfilewasfoundinNoconfigurationfilewasfoundinthePCMCIAConfigurationfileisnormalandwillloadin15Answer:QUESTIONRefertotheexhibit.Whatcanbedeterminedfromtheislocaltotheislocaltothewillageoutinlessthan1hasagedoutandismarkedforAnswer:age下面-QUESTIONRefertotheexhibit.Whichcommandwouldallowthetranslationstobecreatedontheipnatpoolmynats54prefix-lengthipnatoutsidemynats54prefix-lengthipnatpoolmynats54prefix-lengthipnatoutsidemynats54prefix-lengthAnswer:prefix-length表示掩碼的長(zhǎng)度。prefix-length19表示掩碼為QUESTIONRefertotheexhibit.Anadministratorsthedefaultgatewayatandseestheoutputasshown.AtwhichOSIlayeristheproblem?datalinkapplicationaccesssessionAnswer:QUESTIONRefertotheexhibit.WhichvaluewillbeconfiguredforDefaultGatewayoftheLocalAreaAnswer:QUESTIONRefertotheexhibit.TheuseratWorkstationBreportsthatServerAcannotbereached.WhatispreventingWorkstationBfromreachingServerA?TheIPaddressforServerAisabroadcastThegatewayforWorkstationBisnotonthesameThegatewayforServerAisnotonthesameAnswer:QUESTIONRefertotheexhibit.Whatdoesthe(*)representinthePacketisdestinedforalocalinterfacetothePacketwastranslated,butnoresponsewasreceivedfromthedistantPacketwasnottranslated,becausenoadditionalportsarePacketwastranslatedandfastswitchedtotheAnswer:QUESTIONRefertotheexhibit.WhatcommandsequencewillenablePATfromtheinsidetooutside(config)ipnatpoolisp-netnetmask(config-if)ipnatoutside(config)ipnatinsidesourcelist1interfaceethernet1(config-if)ipnatinsideAnswer:QUESTIONRefertotheexhibit.WhatwillhappentoHTTPtrafficcomingfromtheInternetthatisdestinedfor0ifthetrafficisprocessedbythisACL?Trafficwillbedroppedperline30oftheTrafficwillbeacceptedperline40oftheTrafficwillbedropped,becauseoftheimplicitdenyallatoftheTrafficwillbeaccepted,becausethesourceaddressisnotcoveredbytheAnswer:QUESTIONRefertotheexhibit.WhichstatementdescribestheeffectthattheRouter1configurationhasondevicesinthesubnetwhentheytrytoconnecttoSVR-AusingnetorSSH?DeviceswillnotbeabletousenetorDeviceswillbeabletouseSSH,butnotDeviceswillbeabletousenet,butnotDeviceswillbeabletousenetandAnswer:題目考查的是ACL用法，首先看圖示要控制的是172網(wǎng)段也就是F0/0是in方向f0/1應(yīng)該是out通過(guò)此圖看出list100為fa0/0的in方而list101是f0/1的in172生效的是list只要看list100就可以選出答案可以QUESTIONVLANsestablishbroadcastsinswitchedVLANsprovideamethodofconservingIPaddressesinlargeVLANsallowaccesstonetworkservicesbasedondepartment,notphysicalVLANscangreatlysimplifyadding,moving,orchanginghostsontheAnswer:A：VLAN在交換網(wǎng)絡(luò)中建立廣播域，正確E：vlan允許基于邏輯劃分的網(wǎng)絡(luò)，不是物理位置。正確。F：QUESTIONAnadministratorwouldliketoconfigureaswitchoveravirtualterminalconnectionfromlocationsoutsideofthelocalLAN.Whichofthefollowingarerequiredinorderfortheswitchtobeconfiguredfromaremotelocation?(Choosetwo.)The The ustbeconnectedtoarouteroveraVLANTheswitustbereachablethroughaportconnectedtoitsmanagementThe The ustbefullyconfiguredasanSNMPAnswer:QUESTIONWhichofthefollowinghostaddressesaremembersofnetworksthatcanberoutedacrossthepublicInternet?(Choosethree.)Answer:QUESTIONGivenasubnetmaskof24,whichofthefollowingaddressescanbeassignedtonetworkhosts?(Choosethree.)Answer:QUESTIONWhichofthefollowingarebenefitsofVLANs?(ChooseTheyincreasethesizeofcollisionTheyallowlogicalgrouofusersbyTheycanenhancenetworkTheyincreasethesizeofbroadcastswhiledecreasingthenumberofcollisionTheyincreasethenumberofbroadcastswhiledecreasingthesizeofthebroadcastTheysimplifyswitchAnswer:考查VLAN的特點(diǎn)A：增加域的大小，錯(cuò)誤B： 減少?gòu)V播域的大小時(shí)增加了廣播域個(gè)數(shù)。正確。F:QUESTIONWhichrouterIOScommandscanbeusedtotroubleshootLANconnectivityproblems?(ChooseshowipshowAnswer:A：測(cè)試連通性 查看是否有路由F：QUESTIONRefertotheexhibit.AfterHostAsHostB,whichentrywillbeintheARPcacheofHostAtosupportthisAnswer:MAC作為sourcegateway的mac作為destination封裝Frame，然后將Frame轉(zhuǎn)發(fā)但是數(shù)據(jù)包是不會(huì)進(jìn)QUESTIONWhichtwotopologiesareusingthecorrecttypeoftwisted-paircables?(Choosetwo.)Answer:QUESTIONWhichofthefollowingaretrueregardingbridgesandswitches?(ChooseBridgesarefasterthanswitchesbecausetheyhavefewerAswitchisamultiportBridgesandswitcheslearnMACaddressesbyexaminingthesourceMACaddressofeachframeAnswer:A：網(wǎng)橋比交換機(jī)更快速，因?yàn)樗麄冇懈俚? 通過(guò)檢查數(shù)據(jù)包的sourcemac學(xué)習(xí)mac地址，正確D： QUESTIONWhataresomeoftheadvantagesofusingaroutertosegmentthenetwork?(ChooseFilteringcanoccurbasedonLayer3BroadcastsareRoutersgenerallycostlessthanBroadcastsarenotforwardedacrosstheAnswer:A：可以基于層三的信息過(guò)濾數(shù)據(jù)。B： 路由器的價(jià)格一般比交換機(jī)少。錯(cuò)誤D：QUESTIONWhichofthefollowingstatementsaretrueregardingbridgesandswitches?(ChooseSwitchesareprimarilysoftwarebasedwhilebridgesarehardwareBothbridgesandswitchesforwardLayer2BridgesarefrequentlyfasterthanSwitcheshaveahighernumberofportsthanmostBridgesdefinebroadcastswhileswitchesdefinecollisionBothbridgesandswitchesmakeforwardingdecisionsbasedonLayer2Answer: QUESTIONWhichcharacteristicsarerepresentativeofalink-stateroutingprotocol?(Chooseprovidescommonviewofentireexchangesroutingtableswithcalculatesshortestutilizesevent-triggeredutilizesfrequentperiodicAnswer:A:提供查看拓?fù)淞?，正確。showipospf QUESTIONWhichofthefollowingstatementsdescribethenetworkshowninthegraphic?(ChooseTherearetwobroadcastsintheTherearefourbroadcastsintheTherearesixbroadcastsintheTherearefourcollisionsintheTherearefivecollisionsintheTherearesevencollisionsintheAnswer:QUESTIONUsetheoutputfromtheroutershowninthegraphicabovetodeterminewhichofthefollowingarecorrect.(Choosetwo.)RouterJohnwillreceiveroutingupdatesontheSerial0/0RouterJohnwillreceiveroutingupdatesontheSerial0/1RouterJohnwillsendroutingupdatesouttheSerial0/0RouterJohnwillsendroutingupdatesouttheFastEthernet0/0RouterJohnwillsendroutingupdatesouttheSerial0/1Answer:QUESTIONAnationalretailchainneedstodesignanIPaddressingschemetosupportanationwidenetwork.Thecompanyneedsaminimumof300sub-networksandaumof50hostaddressespersubnet.WorkingwithonlyoneClassBaddress,whichofthefollowingsubnetmaskswillsupportanappropriateaddressingscheme?(Choosetwo.)Answer: 每個(gè)子網(wǎng)只有30個(gè)可用IPF：QUESTIONGiventheaddress9/28,whichofthefollowingarevalidhostaddressesonthissubnet?(Choosetwo.)Answer:QUESTIONAninboundaccesslisthasbeenconfiguredonaserialinterfacetodenypacketentryforTCPandUDPports21,23and25.WhattypesofpacketswillbepermittedbythisACL?(Choosethree.)Answer:acl了tcp/udp212325這三個(gè)端口的流量，哪些流量會(huì)被放行？A：FTP21端口 NET23端口C：SMTP25端口D：DNS53端口E：HTTP80端口FPOP3110QUESTIONWhicharevalidmodesforaswitchportusedasaVLANtrunk?(ChooseAnswer:QUESTIONOSPFroutingusestheconceptofareas.WhatarethecharacteristicsofOSPFareas?(ChooseEachOSPFarearequiresaloopbackinterfacetobeAreasmaybeassignedanynumberfrom0toArea0iscalledthebackboneHierarchicalOSPFnetworksdonotrequiremultipleMultipleOSPFareasmustconnecttoareaSingleareaOSPFnetworksmustbeconfiguredinareaAnswer:A：每個(gè)區(qū)域需要換回口，錯(cuò)誤B：區(qū)域ID的范圍是0--65535，正確C： QUESTIONWhatinformationdoesarouterrunningalink-stateprotocolusetobuildandmaintainitstopologicaldatabase?(Choosetwo.)oSAPmessagessentbyotherLSAsfromotherbeaconsreceivedonpoint-to-pointroutingtablesreceivedfromotherlink-stateTTLpacketsfromdesignatedAnswer: 通過(guò)其他路由器的LSA，正確。D：從QUESTIONItsupportsItisusedtoroutebetweenautonomousItconfinesnetworkinstabilitytooneareaoftheItincreases erheadontheItallowsextensivecontrolofroutingItissimplertoconfigurethanRIPAnswer: QUESTIONTheswitchesshowninthediagram,CoreandCore2,arebothCatalyst2950s.Theaddressingschemeforeachcompanysiteisasfollows:RouterEthernetport-1stusableaddressCore-2ndusableaddressCore2-3rdusableForthisnetwork,whichofthefollowingcommandsmustbeconfiguredonCore2toallowittobemanagedremoyfromanysubnetonthenetwork?(Choosethree.)Core2(config)#interfaceCore2(config-if)#ipaddress0Core2(config)#interfacevlanCore2(config-if)#ipaddress1Core2(config)#linecon0Core2(config-line)#passwordciscoCore2(config)#linevty04Core2(config-line)#passwordciscoCore2(config)#ipdefault-gatewayCore2(config)#iprouteAnswer: QUESTIONAnadministratorisunsuccessfulinaddingVLAN50toaswitch.Whiletroubleshootingtheproblem,theadministratorviewstheoutputoftheshowvtpstatuscommand,whichisdisplayedinthegraphic.WhatcommandsmustbeissuedonthisswitchtoaddVLAN50tothedatabase?(Choosetwo.)Switch(config-if)#switchportaccessvlanSwitch(vlan)#vtpSwitch(config)#config-revisionSwitch(config)#vlan50nameSwitch(vlan)#vlanSwitch(vlan)#switchporttrunkvlanAnswer:QUESTIONWhichofthefollowingIPaddressesfallintotheCIDRblockof/22?(ChooseAnswer:QUESTIONWhichofthefollowingaretypesofflowcontrol?(ChoosecongestionloadAnswer:A：緩存B：直通C：D：E：QUESTIONWhichdestinationaddresseswillbeusedbyHostAtosenddatatoHostC?(ChoosetheMACaddressofSwitchtheIPaddressofHosttheMACaddressofHosttheIPaddressoftherouter'sE0theMACaddressoftherouter'sE0Answer:QUESTIONWhatcanbedeterminedfromthelineofshowiprouteoutputshownintheexhibit?(ChooseThenextroutingupdatecanbeexpectedin35ThisrouteisusingthedefaultadministrativeThenetworkistwohopsawayfromthisAnswer:s/1C：錯(cuò)誤。s0/1的ip無(wú)法得知 正確，rip缺省的管理距離是120E：QUESTIONRefertotheexhibit.Alloftheroutersinthenetworkareconfiguredwiththeipsubnet-zerocommand.WhichnetworkaddressesshouldbeusedforLinkAandNetworkA?(Choosetwo.)NetworkA-NetworkA-NetworkA-LinkA-LinkA-LinkA-Answer:配置了ipsubnet-zero，可以使用全0網(wǎng)段。 E:錯(cuò)誤，包含在2/27網(wǎng)段中QUESTIONWhichtwosubnetworkswouldbeincludedinthesummarizedaddressof/20?(Choose6Answer:QUESTIONThenetworkadministratorhasdiscoveredthatthepowersupplyhasfailedonaswitchinthecompanyLANandthattheswitchhasstoppedfunctioning.IthasbeenreplacedwithaCiscoCatalyst2950seriesswitch.Whatmustbedonetoensurethatthisnewswitch estherootbridgeonthenetwork?LowerthebridgepriorityChangetheMACaddressoftheIncreasetheVTPrevisionnumberfortheLowertherootpathcostontheswitchAssigntheswitchanIPaddresswiththelowestAnswer:考點(diǎn)：STP的原則RID優(yōu)先級(jí)+mac地址QUESTIONRefertotheexhibit.Assumethatalloftherouterinterfacesareoperationalandconfiguredcorrectly.HowwillrouterR2beaffectedbytheconfigurationofR1thatisshownintheexhibit?RouterR2willnotformaneighborrelationshipwithRouterR2willobtainafullroutingtable,includingadefaultroute,fromR2willobtainOSPFupdatesfromR1,butwillnotobtainadefaultroutefromR2willnothavearouteforthedirectlyconnectedserialnetwork,butallotherdirectlyconnectednetworkswillbepresent,aswellasthetwoEthernetnetworksconnectedtoR1.Answer:QUESTIONWhichthreeIPaddressescanbeassignedtohostsifthesubnetmaskis/27andsubnetzeroisusable?(Choosethree.)Answer:E：剛好是網(wǎng)絡(luò)號(hào)，錯(cuò)誤F：QUESTIONarrivesattheHokesBrouter.WhtiondoestherouterforwardsthereceivedpacketouttheSerial0/0forwardsapacketcontaininganEIGRPadvertisementouttheSerial0/1Answer:QUESTIONRefertotheexhibit.FromRouterA,anetworkadministratorisabletotheserialinterfaceofRouterBbutunabletoanyofthesubnetsattachedtoRouterB.Basedonthepartialoutputsintheexhibit,whatcouldbetheproblem?EIGRPdoesnotsupportTheEIGRPnetworkstatementsareincorrectlyTheIPaddressingontheserialinterfaceofRouterAisTheroutingprotocolhassummarizedontheclassfulEIGRPhasbeenconfiguredwithaninvalidautonomoussystemAnswer:QUESTIONItconvergesItusescosttodeterminethebestItusestheDUALalgorithmtodeterminethebestOSPFroutersdiscoverneighborsbeforeexchangingroutingAnswer:ACF 使用dual算法，錯(cuò)誤，這個(gè)是EIGRP的算法E： QUESTIONRefertotheexhibit.SW1andSW2havedefaultconfigurations.Whatwillhappenifhost1sendsaHosts2,3,and4willreceivetheHosts1,2,3,and4willreceivetheHost2andtheFa0/0interfaceofR1willreceivetheHosts2,3,4,andinterfacesFa0/0andFa0/1ofR1willreceivetheAnswer:QUESTIONArouterhaslearnedthreepossibleroutesthatcouldbeusedtoreachadestinationnetwork.OnerouteisfromEIGRPandhasacompositemetricof20514560.AnotherrouteisfromOSPFwithametricof782.ThelastisfromRIPv2andhasametricof4.WhichrouteorrouteswilltherouterinstallintheroutingtheOSPFtheEIGRPtheRIPv2allthreetheOSPFandRIPv2Answer:EIGRPOSPFRIPQUESTIONForwhattwopurposesdoestheEthernetprotocolusephysicaladdresses?(ChoosetouniquelyidentifydevicesatLayertoallowcommunicationwithdevicesonadifferenttodifferentiateaLayer2framefromaLayer3toestablishaprioritysystemtodeterminewhichdevicegetstotransmittoallowcommunicationbetweendifferentdevicesonthesametoallowdetectionofaremotedevicewhenitsphysicaladdressisAnswer:A：在二層唯一確定一臺(tái)設(shè)備，正 QUESTIONAsaframeleavesaLayer3device,theLayer2encapsulationinformationischangedfromwhatitwaswhenitenteredthedevice.Forwhattworeasonscanthishappen?(Choosetwo.)Thedataismovingfrom10BASE-TXto100BASE-TheWANencapsulationtypehasThedataformathaschangedfromogtoThesourceanddestinationhostsareinthesameThesourceanddestinationMACaddresseshaveAnswer: QUESTIONPassiveroutesareintheprocessofbeingcalculatedbyEIGRPsupportsVLSM,routesummarization,androutingupdateEIGRPexchangesfullroutingtableinformationwithneighboringrouterswitheveryIfthefeasiblesuccessorhasahigheradvertiseddistancethanthesuccessorroute,it estheprimaryroute.Aqueryprocessisusedtodiscoverareplacementforafailedrouteifafeasiblesuccessorisnotidentifiedfromthecurrentroutinginformation.Answer: QUESTIONRefertotheexhibit.Inthecommunicationbetweenhost1andhost2overthepoint-to-pointWAN,whichprotocolortechnologyisrepresentedbydashedlineA?Answer: D：ieee802.3QUESTIONRefertotheexhibit.TheswitchinthegraphichasadefaultconfigurationandtheMACtableisfullypopulated.Inaddition,thisnetworkisoperatingproperly.ThegraphicrepresentsselectedheaderinformationinaframeleavinghostA.Whatcanbeconcludedfromthisinformation?TheMACaddressofhostAisTherouterwillforwardthepacketinthisframetotheTheswitchwillonlyforwardthisframetotheattachedrouterAlldevicesinthisLANexcepthostAwillpassthepackettoLayerAnswer:QUESTIONWhatisanappropriateuseofadefaulttoprovideroutingtoalocalwebtoprovideroutingfromanISPtoastubtoprovideroutingthatwilloverridetheconfigureddynamicroutingtoprovideroutingtoadestinationthatisnotspecifiedintheroutingtableandwhichisoutsidethelocalAnswer:A：提供路由到本地webB：QUESTIONRefertotheexhibit.Ajuniornetworkengineerhaspreparedtheexhibitedconfigurationfile.Whattwostatementsaretrueoftheplannedconfigurationforinterfacefa0/1?(Choosetwo.)ThetwoFastEthernetinterfaceswillrequireNATconfiguredontwooutsideserialAddresstranslationonfa0/1isnotrequiredforDMZDevicestoaccesstheThefa0/1IPaddressoverlapswiththespaceusedbyThefa0/1IPaddressisinvalidfortheIPsubnetonwhichitInternethostsmaynotinitiateconnectionstoDMZDevicesthroughtheconfigurationthatisAnswer:QUESTIONRefertotheexhibit.Tworoutershavejustbeenconfiguredbyanewtechnician.Allinterfacesareup.However,theroutersarenotsharingtheirroutingtables.Whatistheproblem?SplithorizonispreventingRouter2fromreceivingroutinginformationfromRouter1isconfiguredforRIPversion2,andRouter2isconfiguredforRIPversionRouter1hasanACLthatisblockingRIPversionThereisaphysicalconnectivityproblembetweenRouter1andRouter1isusingauthenticationandRouter2isAnswer:QUESTIONAmedium-sizedcompanyhasaClassCIPaddress.IthastwoCiscoroutersandonenon-Ciscorouter.AllthreeroutersareusingRIPversion1.Thecompanynetworkisusingtheblockof/24.ThecompanyhasdecideditwouldbeagoodideatosplitthenetworkintothreesmallersubnetsandcreatetheoptionofconservingaddresseswithVLSM.Whatisthebestcourseofactionifthecompanywantstohave40hostsineachofthethreesubnets?ConvertalltherouterstoEIGRPanduse2/27,4/27,and2/27asthenewsubnetworks.asthenewsubnetworks.asthenewsubnetworks.ConvertalltherouterstoRIPversion2anduse4/26,28/26,and133.219.192/26asthenewsubnetworks.ConvertalltherouterstoOSPFanduse6/28,2/28,and8/28asthenewsubnetworks.Answer:QUESTIONRefertotheexhibit.WhyhasthisswitchnotbeenelectedtherootbridgeforIthasmorethanoneinterfacethatisconnectedtotherootnetworkItisrunningRSTPwhiletheelectedrootbridgeisrunning802.1dspanningIthasahigherMACaddressthantheelectedrootIthasahigherbridgeIDthantheelectedrootAnswer:考點(diǎn)：考查STP原則，RID小者優(yōu)先。由提示可知根橋的RID為20481A： QUESTIONRefertotheexhibit.AtofanRSTPelectionprocess,whichaccesslayerswitchportwillassumethediscardingrole?Switch3,portSwitch3,portAnswer:W3為跟橋，W4會(huì)選一個(gè)口作根端，另堵塞。兩個(gè)口o同下端的為跟口，的堵。QUESTIONRefertotheexhibit.HowmanypathscantheEIGRProutingprocessusetoforwardpacketsfromHQ_Routertoaneighborrouter?twoequal-costtwounequal-costthreeequal-costfourequal-costfourunequal-costAnswer:考點(diǎn)：考查EIGRP負(fù)載均衡。根據(jù)提示，variance=3um=4，所以支持不等價(jià)負(fù)載均衡，最多支持A：2條等價(jià)路徑，錯(cuò)誤B：2C：三條等價(jià)路徑，錯(cuò)誤D：三條不等價(jià)路徑，錯(cuò)誤E：四條等價(jià)路徑，錯(cuò)誤F：四條不QUESTIONSelecttheactionthatresultsfromexecutingtheseSwitch(config-if)#switchportport-AdynamicallylearnedMACaddressissavedinthestartup-configurationAdynamicallylearnedMACaddressissavedintherunning-configurationAdynamicallylearnedMACaddressissavedintheVLANStaticallyconfiguredMACaddressesaresavedinthestartup-configurationfileifframesfromthataddressarereceived.StaticallyconfiguredMACaddressesaresavedintherunning-configurationfileifframesfromthataddressarereceived.Answer:DAtatupcnfigE:Augnfiungnfi里了。QUESTIONRefertotheexhibit.Thefollowingcommandsareexecutedoninterfacefa0/1of2950Switch(config-if)#switchportport-security2950Switch(config-if)#switchportport-securitymac-addresssticky2950Switch(config-if)#switchportport-securityum1TheEthernetframethatisshownarrivesoninterfacefa0/1.Whattwofunctionswilloccurwhenthisframeisrece